โ Scribed by J. A. del Cueto
No coin nor oath required. For personal study only.
Performance data gathered in situ from a large-area cadmium telluride (CdTe) thin-ยฎlm photovoltaic (PV) module that has been deployed outdoors since February 1995 are investigated. It appears that the module's performance has been stable over the last 2 years but it exhibits a semi-cyclical variation whereby the eciency appears to peak between the autumnal equinox and winter solstice. Analyses are performed that dissect module currentยฑvoltage parameters by irradiance and examine their dependence on temperature. The temperature coecient of the eciency is quite small and negative from 80% of 1-sun intensity and upwards. Its meager value is the outcome of the sizes and opposite signs of the temperature coecients of the open-circuit voltage and ยฎll factor. Average module series resistance is quantiยฎed and shown to be a determinant in power loss of 11% at 1-sun intensity. It is demonstrated to constrain the ยฎll factor at illumination intensities above 60% of 1-sun, which occurs in the same range of illumination intensities that the temperature coecients of the ยฎll factor exhibit positive values. Evidence is presented that points to some spectrally-induced variations in the eciency.
๐ SIMILAR VOLUMES
The performance of a trellis group code has a close relationship with the order of elements of the output group. In this article, I describe the kind of influence the order of group elements exerts on the performance of the code. First, I introduce a wide-sense homomorphic trellis encoder in this ar